Table 1.

Optimum λ selection for each simulated condition.

Method	Number of projections	λ
		Noise-free	Noise added
CS: p=1, α=0	20	75	50
	12	20	50
	6	20	50
	4	20	50
NCCS: p=0.7, α=0	20	75	50
	12	75	50
	6	20	50
	4	20	50
PICCS: p=1, α=0.7	20	75	50
	12	75	50
	6	50	20
	4	50	10
NCPICCS: p=0.7, α=0.7	20	75	50
	12	75	50
	6	50	50
	4	50	50